/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | foam-extend: Open Source CFD
   \\    /   O peration     | Version:     4.1
    \\  /    A nd           | Web:         http://www.foam-extend.org
     \\/     M anipulation  | For copyright notice see file Copyright
-------------------------------------------------------------------------------
License
	This file is part of foam-extend.

	foam-extend is free software: you can redistribute it and/or modify it
	under the terms of the GNU General Public License as published by the
	Free Software Foundation, either version 3 of the License, or (at your
	option) any later version.

	foam-extend is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
	General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with foam-extend.  If not, see <http://www.gnu.org/licenses/>.

Description
	Return location of contact sphere on the face

\*---------------------------------------------------------------------------*/

#include "face.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

Foam::scalar Foam::face::contactSphereDiameter
(
	const point& p,
	const vector& n,
	const pointField& meshPoints
) const
{
	vector n1 = n/(Foam::mag(n) + SMALL);
	vector n2 = normal(meshPoints);

	n2 /= Foam::mag(n2) + SMALL;

	return 2*((centre(meshPoints) - p) & n2)/((n1 & n2) - 1.0);
}


// ************************************************************************* //
